Lets an account keep its last-seen/online line in INFO visible only to
itself and to opers. Default stays public (Anope's default). Accepts
STATUS (with USERMASK as an alias) per Anope's SET HIDE <field> grammar.
The account's last-active time was tracked but never surfaced. INFO now
reports it, reading 'now (online)' when the account has a live session.
Threads NetView into the INFO handler for the session lookup and carries
last_seen on AccountView.
Rebrand the daemon and workspace: the binary is now `echo`, every crate
is `echo-*` (`echo-api` and the module crates), Rust imports use
`echo_*`, the gRPC proto is `proto/echo.proto` with package `echo.v1`,
and the log filter, gossip peer-name default, and on-disk store default
(`echo.db.jsonl`) follow. Docs updated throughout. No behaviour change;
crate directories and the config schema are untouched.
The service pseudo-clients and the ircd protocol link sat flat at the
repo root, mixed in with the daemon core and the SDK. Move them all
under modules/ so the tree separates concerns cleanly: the daemon in
src/, the SDK every module links against in api/, and the loadable
modules — the pseudo-clients plus the protocol link — in modules/.
Workspace members, the daemon's per-crate dependency paths, and each
module's api path are updated to match; the docs follow. No code change.
